H3C S5500-EI series Operation Manual page 1012

Operation Manual – DHCP
H3C S5500-EI Series Ethernet Switches
II. Network diagram
GE1/0/2
DHCP client
Figure 5-3 Network diagram for DHCP snooping configuration
III. Configuration procedure
# Enable DHCP snooping.
<SwitchB> system-view
[SwitchB] dhcp-snooping
# Specify GigabitEthernet 1/0/1 as trusted port.
[SwitchB] interface gigabitethernet 1/0/1
[SwitchB-GigabitEthernet1/0/1] dhcp-snooping trust
[SwitchB-GigabitEthernet1/0/1] quit
# Configure DHCP Snooping to support Option 82 on GigabitEthernet 1/0/2.
[SwitchB] interface gigabitethernet 1/0/2
[SwitchB-GigabitEthernet1/0/2] dhcp-snooping information enable
# Configure the padding format to verbose for Option 82 on GigabitEthernet 1/0/2.
[SwitchB-GigabitEthernet1/0/2]
node-identifier sysname
[SwitchB-GigabitEthernet1/0/2] quit
# Configure DHCP Snooping to support Option 82 on GigabitEthernet 1/0/3.
[SwitchB] interface gigabitethernet 1/0/3
[SwitchB-GigabitEthernet1/0/3] dhcp-snooping information enable
# Configure the padding format to verbose for Option 82 on GigabitEthernet 1/0/3.
[SwitchB-GigabitEthernet1/0/3]
node-identifier sysname
Switch A
DHCP server
GE1/0/1
Switch B
DHCP snooping
GE1/0/3
DHCP client
Chapter 5 DHCP Snooping Configuration
dhcp-snooping information
dhcp-snooping information
5-7
format verbose
format verbose